Compaq AA-PWCBD-TE Manuel d'utilisateur Page 27
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Getting Started with DECTPU
2.4 Using Journal Files
2.4.1 Keystroke Journaling
In keystroke journaling, DECTPU keeps track of each keystroke made during
a session, regardless of which buffer is in use. If a system interruption occurs
during a session, you can reconstruct the work done during the session.
To determine the name of the keystroke journal file, use a statement similar to
the following:
filename := GET_INFO (SYSTEM, "journal_file");
For more information on using a keystroke journal file for recovery, see
Section 2.6.8 and the Extensible Versatile Editor Reference Manual.
Note
Compaq strongly recommends the use of buffer-change journaling rather
than keystroke journaling.
To reconstruct your work, use the /JOURNAL and /RECOVER qualifiers. The
following example shows system recovery on a file called JACKI.SDML:
$ EDIT/TPU JACKI.SDML /JOURNAL /RECOVER
2.4.2 Buffer-Change Journaling
Buffer-change journaling creates a separate journal file for each text buffer.
The application can use the enhanced SET (JOURNALING) built-in to direct
DECTPU to establish and maintain a separate journal file for any buffer or
buffers created during the session. The application programmer or user can also
use the SET (JOURNALING) built-in to turn journaling off or on for a given
buffer during a session.
In the buffer’s journal file, DECTPU keeps track of the following record attributes
(and any changes made to them):
• Left margin setting
• Modifiability or unmodifiability
• Display value
The journal file also tracks the following:
• Characters inserted in and deleted from a record (including the location
where the change took place)
• Records inserted in and deleted from a buffer (including the location where
the change took place)
To determine whether buffer-change journaling is turned on, use the following
statement:
status := GET_INFO (buffer_name, "journaling");
For more information on record attributes and display values, see the descriptions
of the SET (RECORD_ATTRIBUTE) and SET (DISPLAY_VALUE) built-in
procedures in the DEC Text Processing Utility Reference Manual.
Buffer-change journaling does not keep a record of all keystrokes performed while
editing a given buffer.
Getting Started with DECTPU 2–7
- Guide to the DEC Text 1
- ProcessingUtility 1
- Contents 3
- A Sample DECTPU Procedures 7
- B DECTPU Terminal Support 7
- C DECTPU Debugger Commands 7
- Examples 7
- Intended Audience 9
- Document Structure 9
- Related Documents 9
- Reader’s Comments 9
- Conventions 10
- Monospace text 11
- 1.1 Description of DECTPU 13
- 1.1.3 DECTPU Environments 14
- 1.3 Description of EVE 16
- 1.4 DECTPU Language 17
- 1.4.5 User-Written Procedures 19
- 1.6 Learning Path for DECTPU 20
- Getting Started with DECTPU 21
- 2.1.2 Startup Files 22
- 2.4 Using Journal Files 26
- 2.4.1 Keystroke Journaling 27
- 2.6.1 /CHARACTER_SET 29
- 2.6.2 /COMMAND 30
- 2.6.3 /CREATE 31
- 2.6.4 /DEBUG 32
- 2.6.5 /DISPLAY 32
- 2.6.6 /INITIALIZATION 33
- 2.6.7 /INTERFACE 34
- 2.6.8 /JOURNAL 34
- 2.6.9 /MODIFY 35
- 2.6.10 /OUTPUT 36
- 2.6.11 /READ_ONLY 37
- 2.6.12 /RECOVER 38
- 2.6.13 /SECTION 39
- 2.6.14 /START_POSITION 40
- 3.1 Array Data Type 42
- 3.2 Buffer Data Type 43
- 3.3 Integer Data Type 44
- 3.4 Keyword Data Type 45
- 3.5 Learn Data Type 47
- 3.6 Marker Data Type 48
- 3.7 Pattern Data Type 50
- 3.7.3 Using Pattern Operators 53
- 3.7.5 Searching for a Pattern 56
- 3.7.6 Anchoring a Pattern 57
- 3.8 Process Data Type 58
- 3.9 Program Data Type 58
- 3.10 Range Data Type 59
- 3.11 String Data Type 60
- 3.12 Unspecified Data Type 61
- 3.13 Widget Data Type 62
- 3.14 Window Data Type 62
- 3.14.2 Creating Windows 63
- 3.14.4 Mapping Windows 64
- 3.14.5 Removing Windows 65
- Utility Language 67
- 4.3 Character Sets 68
- 4.3.3 General Character Sets 69
- 4.3.5 DECTPU Symbols 70
- 4.4 Identifiers 71
- 4.5 Variables 71
- 4.6 Constants 72
- 4.7 Operators 73
- 4.8 Expressions 74
- 4.8.1 Arithmetic Expressions 76
- 4.8.2 Relational Expressions 76
- 4.8.3 Pattern Expressions 77
- 4.8.4 Boolean Expressions 77
- 4.9 Reserved Words 78
- 4.10 Lexical Keywords 100
- Development 101
- 5.1 Creating DECTPU Programs 102
- 5.1.1 Simple Programs 102
- 5.1.2 Complex Programs 102
- 5.1.3 Program Syntax 103
- 5.2.1 Widget Support 104
- 5.2.2 Input Focus Support 105
- "AUXILIARY" 106
- 5.2.4 Using Callbacks 107
- 5.2.5 Using Closures 110
- 5.4 Compiling DECTPU Programs 114
- 5.5 Executing DECTPU Programs 115
- 5.5.1 Procedure Execution 116
- 5.5.2 Process Suspension 116
- 5.6.1 Section Files 117
- 5.6.2 Command Files 117
- 5.6.3 Initialization Files 118
- 5.6.5 Using Section Files 119
- 5.6.6 Using Command Files 124
- 5.7 Debugging DECTPU Programs 128
- 5.8 Handling Errors 130
- Sample DECTPU Procedures 131
- A.1 Line-Mode Editor 132
- DECTPU Terminal Support 139
- B.3 Using Terminal Wrap 141
- DECTPU Debugger Commands 143
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